diff --git a/themes/vivo-basic/templates/head.ftl b/themes/vivo-basic/templates/head.ftl
index c5b27a21..91759730 100644
--- a/themes/vivo-basic/templates/head.ftl
+++ b/themes/vivo-basic/templates/head.ftl
@@ -10,4 +10,6 @@
 
 <#include "headScripts.ftl">
 
+<#-- Inject head content specified in the controller. Currently this is used only to generate an rdf link on 
+an individual profile page. -->
 ${headContent!}
\ No newline at end of file
diff --git a/themes/wilma/templates/head.ftl b/themes/wilma/templates/head.ftl
index b597cbaa..c09f4581 100644
--- a/themes/wilma/templates/head.ftl
+++ b/themes/wilma/templates/head.ftl
@@ -30,4 +30,6 @@
 <script type="text/javascript" src="${urls.home}/js/selectivizr.js"></script>
 <![endif]-->
 
+<#-- Inject head content specified in the controller. Currently this is used only to generate an rdf link on 
+an individual profile page. -->
 ${headContent!}
\ No newline at end of file